Abstract

Raman spectroscopy and atomic-force microscopy were applied to study the morphology of nanoislands grown on strained sublayers. It was shown that the growth of nanoislands on strained sublayer not only induces the effect of their spatial ordering but also enhances the role of interdiffusion processes. Unusual high island volume increase during the epitaxy is explained by anomalous strong material diffusion from the sublayer into the islands, induced by nonuniform field of elastic strains.

Received 08 February 2010Accepted 17 March 2010Published online 09 April 2010

Acknowledgments:

Authors are thankful to V. P. Kladko for the data on x-ray diffraction in investigated structures. The work was supported by Russian Foundation for Basic Research and by National Academy of Sciences of Ukraine.